... strength 3. insulation 4. long using life frp square pipe hollow frp pipe is usually used as beam,armrest,fence,and ... retardant.Light weight and high strengthUV resistanceCustomizationSafetyInsulationEconomy CharacteristicApplicationfrp square pipe hollow frp pipe can be applied as beams,handrail, armrest,ladder ... engineering;weaving and dyeing; pharmaceuticals;Food processing;Marine. frp square pipe